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Title: Toward Inexpensive Photocatalytic Hydrogen Evolution: A Nickel Sulfide Catalyst Supported on a High-Stability Metal–Organic Framework

Abstract

Few-atom clusters composed of nickel and sulfur have been successfully installed into the Zr(IV)-based metal–organic framework (MOF) NU-1000 via ALD-like chemistry (ALD = atomic layer deposition). Here, X-ray photoelectron spectroscopy and Raman spectroscopy are used to determine that primarily Ni2+ and S2– sites are deposited within the MOF. In a pH 7 buffered aqueous solution, the porous catalyst is able to produce H2 gas at a rate of 3.1 mmol g–1 h–1 upon UV irradiation, whereas no H2 is generated by irradiating bare NU-1000. Upon visible light irradiation, little H2 generation was observed; however, with the addition of an organic dye, rose bengal, NiS-AIM can catalyze the production of H2 at an enhanced rate of 4.8 mmol g–1 h–1. These results indicate that ALD in MOFs (AIM) can engender reactivity within high surface area supports for applications in the solar fuels field.

Authors:
 [1];  [1];  [2];  [1]
  1. Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
  2. Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry; King Abdulaziz Univ., Jeddah (Saudi Arabia). Dept. of Chemistry
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research Center for Inorganometallic Catalyst Design (ICDC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOD; National Science Foundation (NSF)
OSTI Identifier:
1388232
Grant/Contract Number:  
SC0012702; DMR-1121262
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 8; Journal Issue: 32; Related Information: ICDC partners with University of Minnesota(lead); Argonne National Laboratory; Clemson University; Dow Chemical Company; Northwestern University; Pacific Northwest National Laboratory; University of California Davis; University of Washington; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; catalysis (heterogeneous); materials and chemistry by design; synthesis (novel materials); metal−organic framework; nickel sulfide; hydrogen evolution; atomic layer deposition; photocatalysis

Citation Formats

Peters, Aaron W., Li, Zhanyong, Farha, Omar K., and Hupp, Joseph T. Toward Inexpensive Photocatalytic Hydrogen Evolution: A Nickel Sulfide Catalyst Supported on a High-Stability Metal–Organic Framework. United States: N. p., 2016. Web. doi:10.1021/acsami.6b04729.
Peters, Aaron W., Li, Zhanyong, Farha, Omar K., & Hupp, Joseph T. Toward Inexpensive Photocatalytic Hydrogen Evolution: A Nickel Sulfide Catalyst Supported on a High-Stability Metal–Organic Framework. United States. https://doi.org/10.1021/acsami.6b04729
Peters, Aaron W., Li, Zhanyong, Farha, Omar K., and Hupp, Joseph T. Wed . "Toward Inexpensive Photocatalytic Hydrogen Evolution: A Nickel Sulfide Catalyst Supported on a High-Stability Metal–Organic Framework". United States. https://doi.org/10.1021/acsami.6b04729. https://www.osti.gov/servlets/purl/1388232.
@article{osti_1388232,
title = {Toward Inexpensive Photocatalytic Hydrogen Evolution: A Nickel Sulfide Catalyst Supported on a High-Stability Metal–Organic Framework},
author = {Peters, Aaron W. and Li, Zhanyong and Farha, Omar K. and Hupp, Joseph T.},
abstractNote = {Few-atom clusters composed of nickel and sulfur have been successfully installed into the Zr(IV)-based metal–organic framework (MOF) NU-1000 via ALD-like chemistry (ALD = atomic layer deposition). Here, X-ray photoelectron spectroscopy and Raman spectroscopy are used to determine that primarily Ni2+ and S2– sites are deposited within the MOF. In a pH 7 buffered aqueous solution, the porous catalyst is able to produce H2 gas at a rate of 3.1 mmol g–1 h–1 upon UV irradiation, whereas no H2 is generated by irradiating bare NU-1000. Upon visible light irradiation, little H2 generation was observed; however, with the addition of an organic dye, rose bengal, NiS-AIM can catalyze the production of H2 at an enhanced rate of 4.8 mmol g–1 h–1. These results indicate that ALD in MOFs (AIM) can engender reactivity within high surface area supports for applications in the solar fuels field.},
doi = {10.1021/acsami.6b04729},
journal = {ACS Applied Materials and Interfaces},
number = 32,
volume = 8,
place = {United States},
year = {Wed Aug 03 00:00:00 EDT 2016},
month = {Wed Aug 03 00:00:00 EDT 2016}
}

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Works referenced in this record:

Powering the planet: Chemical challenges in solar energy utilization
journal, October 2006

  • Lewis, N. S.; Nocera, D. G.
  • Proceedings of the National Academy of Sciences, Vol. 103, Issue 43, p. 15729-15735
  • DOI: 10.1073/pnas.0603395103

Pathways for solar photovoltaics
journal, January 2015

  • Jean, Joel; Brown, Patrick R.; Jaffe, Robert L.
  • Energy & Environmental Science, Vol. 8, Issue 4
  • DOI: 10.1039/C4EE04073B

Solar fuels: thermodynamics, candidates, tactics, and figures of merit
journal, January 2010

  • McDaniel, Neal D.; Bernhard, Stefan
  • Dalton Transactions, Vol. 39, Issue 42
  • DOI: 10.1039/c0dt00454e

Technical and economic feasibility of centralized facilities for solar hydrogen production via photocatalysis and photoelectrochemistry
journal, January 2013

  • Pinaud, Blaise A.; Benck, Jesse D.; Seitz, Linsey C.
  • Energy & Environmental Science, Vol. 6, Issue 7
  • DOI: 10.1039/c3ee40831k

Roles of Cocatalysts in Photocatalysis and Photoelectrocatalysis
journal, March 2013

  • Yang, Jinhui; Wang, Donge; Han, Hongxian
  • Accounts of Chemical Research, Vol. 46, Issue 8
  • DOI: 10.1021/ar300227e

Biomimetic Hydrogen Evolution:  MoS 2 Nanoparticles as Catalyst for Hydrogen Evolution
journal, April 2005

  • Hinnemann, Berit; Moses, Poul Georg; Bonde, Jacob
  • Journal of the American Chemical Society, Vol. 127, Issue 15
  • DOI: 10.1021/ja0504690

Recent Development of Molybdenum Sulfides as Advanced Electrocatalysts for Hydrogen Evolution Reaction
journal, April 2014

  • Yan, Ya; Xia, BaoYu; Xu, Zhichuan
  • ACS Catalysis, Vol. 4, Issue 6
  • DOI: 10.1021/cs500070x

Nanostructured hydrotreating catalysts for electrochemical hydrogen evolution
journal, January 2014

  • Morales-Guio, Carlos G.; Stern, Lucas-Alexandre; Hu, Xile
  • Chemical Society Reviews, Vol. 43, Issue 18
  • DOI: 10.1039/C3CS60468C

The Chemistry and Applications of Metal-Organic Frameworks
journal, August 2013

  • Furukawa, H.; Cordova, K. E.; O'Keeffe, M.
  • Science, Vol. 341, Issue 6149, p. 1230444-1230444
  • DOI: 10.1126/science.1230444

Hybrid porous solids past, present, future
journal, January 2008

  • Férey, Gérard
  • Chem. Soc. Rev., Vol. 37, Issue 1, p. 191-214
  • DOI: 10.1039/B618320B

Soft porous crystals
journal, November 2009

  • Horike, Satoshi; Shimomura, Satoru; Kitagawa, Susumu
  • Nature Chemistry, Vol. 1, Issue 9, p. 695-704
  • DOI: 10.1038/nchem.444

Rational Design, Synthesis, Purification, and Activation of Metal−Organic Framework Materials
journal, August 2010

  • Farha, Omar K.; Hupp, Joseph T.
  • Accounts of Chemical Research, Vol. 43, Issue 8, p. 1166-1175
  • DOI: 10.1021/ar1000617

Metal–Organic Framework Materials with Ultrahigh Surface Areas: Is the Sky the Limit?
journal, August 2012

  • Farha, Omar K.; Eryazici, Ibrahim; Jeong, Nak Cheon
  • Journal of the American Chemical Society, Vol. 134, Issue 36, p. 15016-15021
  • DOI: 10.1021/ja3055639

Chemical, thermal and mechanical stabilities of metal–organic frameworks
journal, February 2016


Gold(III) – metal organic framework bridges the gap between homogeneous and heterogeneous gold catalysts
journal, July 2009


Sintering-Resistant Single-Site Nickel Catalyst Supported by Metal–Organic Framework
journal, February 2016

  • Li, Zhanyong; Schweitzer, Neil M.; League, Aaron B.
  • Journal of the American Chemical Society, Vol. 138, Issue 6
  • DOI: 10.1021/jacs.5b12515

Comparative study of titanium-functionalized UiO-66: support effect on the oxidation of cyclohexene using hydrogen peroxide
journal, January 2015

  • Nguyen, Huong Giang T.; Mao, Lily; Peters, Aaron W.
  • Catalysis Science & Technology, Vol. 5, Issue 9
  • DOI: 10.1039/C5CY00825E

Metal organic frameworks for photo-catalytic water splitting
journal, January 2015

  • Meyer, K.; Ranocchiari, M.; van Bokhoven, J. A.
  • Energy & Environmental Science, Vol. 8, Issue 7
  • DOI: 10.1039/C5EE00161G

Metal–Organic Frameworks for Light Harvesting and Photocatalysis
journal, November 2012

  • Wang, Jin-Liang; Wang, Cheng; Lin, Wenbin
  • ACS Catalysis, Vol. 2, Issue 12
  • DOI: 10.1021/cs3005874

A porous proton-relaying metal-organic framework material that accelerates electrochemical hydrogen evolution
journal, September 2015

  • Hod, Idan; Deria, Pravas; Bury, Wojciech
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms9304

A Water-Stable Porphyrin-Based Metal-Organic Framework Active for Visible-Light Photocatalysis
journal, June 2012

  • Fateeva, Alexandra; Chater, Philip A.; Ireland, Christopher P.
  • Angewandte Chemie International Edition, Vol. 51, Issue 30
  • DOI: 10.1002/anie.201202471

Significantly enhanced photocatalytic hydrogen evolution under visible light over CdS embedded on metal–organic frameworks
journal, January 2013

  • He, Jiao; Yan, Zhiying; Wang, Jiaqiang
  • Chemical Communications, Vol. 49, Issue 60
  • DOI: 10.1039/c3cc43218a

Photosensitizing Metal–Organic Framework Enabling Visible-Light-Driven Proton Reduction by a Wells–Dawson-Type Polyoxometalate
journal, February 2015

  • Zhang, Zhi-Ming; Zhang, Teng; Wang, Cheng
  • Journal of the American Chemical Society, Vol. 137, Issue 9
  • DOI: 10.1021/jacs.5b00075

Pt Nanoparticles@Photoactive Metal–Organic Frameworks: Efficient Hydrogen Evolution via Synergistic Photoexcitation and Electron Injection
journal, April 2012

  • Wang, Cheng; deKrafft, Kathryn E.; Lin, Wenbin
  • Journal of the American Chemical Society, Vol. 134, Issue 17
  • DOI: 10.1021/ja300539p

Metal-Organic Framework Templated Synthesis of Fe2O3/TiO2 Nanocomposite for Hydrogen Production
journal, March 2012

  • deKrafft, Kathryn E.; Wang, Cheng; Lin, Wenbin
  • Advanced Materials, Vol. 24, Issue 15, p. 2014-2018
  • DOI: 10.1002/adma.201200330

Development of a Ru complex-incorporated MOF photocatalyst for hydrogen production under visible-light irradiation
journal, January 2014

  • Toyao, Takashi; Saito, Masakazu; Dohshi, Satoru
  • Chemical Communications, Vol. 50, Issue 51
  • DOI: 10.1039/c4cc02397h

Post-synthesis modification of a metal–organic framework to construct a bifunctional photocatalyst for hydrogen production
journal, January 2013

  • Zhou, Tianhua; Du, Yonghua; Borgna, Armando
  • Energy & Environmental Science, Vol. 6, Issue 11
  • DOI: 10.1039/c3ee41548a

Nanostructured metal chalcogenides: synthesis, modification, and applications in energy conversion and storage devices
journal, January 2013

  • Gao, Min-Rui; Xu, Yun-Fei; Jiang, Jun
  • Chemical Society Reviews, Vol. 42, Issue 7
  • DOI: 10.1039/c2cs35310e

Metal sulfide nanostructures: synthesis, properties and applications in energy conversion and storage
journal, January 2012

  • Lai, Chen-Ho; Lu, Ming-Yen; Chen, Lih-Juann
  • J. Mater. Chem., Vol. 22, Issue 1
  • DOI: 10.1039/C1JM13879K

Solar water-splitting into H2 and O2: design principles of photosystem II and hydrogenases
journal, January 2008

  • Lubitz, Wolfgang; Reijerse, Edward J.; Messinger, Johannes
  • Energy & Environmental Science, Vol. 1, Issue 1
  • DOI: 10.1039/b808792j

Enhanced Photochemical Hydrogen Production by a Molecular Diiron Catalyst Incorporated into a Metal–Organic Framework
journal, October 2013

  • Pullen, Sonja; Fei, Honghan; Orthaber, Andreas
  • Journal of the American Chemical Society, Vol. 135, Issue 45
  • DOI: 10.1021/ja407176p

Incorporation of iron hydrogenase active sites into a highly stable metal–organic framework for photocatalytic hydrogen generation
journal, January 2014

  • Sasan, Koroush; Lin, Qipu; Mao, ChengYu
  • Chemical Communications, Vol. 50, Issue 72
  • DOI: 10.1039/C4CC03946G

Vapor-Phase Metalation by Atomic Layer Deposition in a Metal–Organic Framework
journal, May 2013

  • Mondloch, Joseph E.; Bury, Wojciech; Fairen-Jimenez, David
  • Journal of the American Chemical Society, Vol. 135, Issue 28, p. 10294-10297
  • DOI: 10.1021/ja4050828

Metal–Organic Framework Thin Films as Platforms for Atomic Layer Deposition of Cobalt Ions To Enable Electrocatalytic Water Oxidation
journal, December 2015

  • Kung, Chung-Wei; Mondloch, Joseph E.; Wang, Timothy C.
  • ACS Applied Materials & Interfaces, Vol. 7, Issue 51
  • DOI: 10.1021/acsami.5b06901

Targeted Single-Site MOF Node Modification: Trivalent Metal Loading via Atomic Layer Deposition
journal, June 2015


Synthetic Access to Atomically Dispersed Metals in Metal–Organic Frameworks via a Combined Atomic-Layer-Deposition-in-MOF and Metal-Exchange Approach
journal, February 2016


Scalable synthesis and post-modification of a mesoporous metal-organic framework called NU-1000
journal, December 2015

  • Wang, Timothy C.; Vermeulen, Nicolaas A.; Kim, In Soo
  • Nature Protocols, Vol. 11, Issue 1
  • DOI: 10.1038/nprot.2016.001

Hydrothermal Growth and Morphology Modification of β-NiS Three-Dimensional Flowerlike Architectures
journal, September 2007

  • Li, Haibo; Chai, Lanlan; Wang, Xiaoqing
  • Crystal Growth & Design, Vol. 7, Issue 9
  • DOI: 10.1021/cg0703588

Pyrene-Terminated Phenylenethynylene Rigid Linkers Anchored to Metal Oxide Nanoparticles
journal, August 2006

  • Taratula, Olena; Rochford, Jonathan; Piotrowiak, Piotr
  • The Journal of Physical Chemistry B, Vol. 110, Issue 32
  • DOI: 10.1021/jp0623847

Ultrafast Dynamics of Defect-Assisted Electron–Hole Recombination in Monolayer MoS 2
journal, December 2014

  • Wang, Haining; Zhang, Changjian; Rana, Farhan
  • Nano Letters, Vol. 15, Issue 1
  • DOI: 10.1021/nl503636c

Evaluation of Brønsted acidity and proton topology in Zr- and Hf-based metal–organic frameworks using potentiometric acid–base titration
journal, January 2016

  • Klet, Rachel C.; Liu, Yangyang; Wang, Timothy C.
  • Journal of Materials Chemistry A, Vol. 4, Issue 4
  • DOI: 10.1039/C5TA07687K

Intergrowth of Cocatalysts with Host Photocatalysts for Improved Solar-to-Hydrogen Conversion
journal, January 2016

  • Qin, Zhixiao; Chen, Yubin; Wang, Xixi
  • ACS Applied Materials & Interfaces, Vol. 8, Issue 2
  • DOI: 10.1021/acsami.5b09943

Enhanced photocatalytic H 2 evolution over noble-metal-free NiS cocatalyst modified CdS nanorods/g-C 3 N 4 heterojunctions
journal, January 2015

  • Yuan, Jielin; Wen, Jiuqing; Zhong, Yongming
  • Journal of Materials Chemistry A, Vol. 3, Issue 35
  • DOI: 10.1039/C5TA04573H

Fabrication of NiS modified CdS nanorod p–n junction photocatalysts with enhanced visible-light photocatalytic H2-production activity
journal, January 2013

  • Zhang, Jun; Qiao, Shi Zhang; Qi, Lifang
  • Physical Chemistry Chemical Physics, Vol. 15, Issue 29
  • DOI: 10.1039/c3cp50734c

Theoretical Investigation of Charge Transfer in Metal Organic Frameworks for Electrochemical Device Applications
journal, October 2015

  • Patwardhan, Sameer; Schatz, George C.
  • The Journal of Physical Chemistry C, Vol. 119, Issue 43
  • DOI: 10.1021/acs.jpcc.5b06065

Photocatalytic Hydrogen Generation System Using a Nickel-Thiolate Hexameric Cluster
journal, July 2013

  • Kagalwala, Husain N.; Gottlieb, Eric; Li, Gao
  • Inorganic Chemistry, Vol. 52, Issue 15
  • DOI: 10.1021/ic4013069

Nickel Pyridinethiolate Complexes as Catalysts for the Light-Driven Production of Hydrogen from Aqueous Solutions in Noble-Metal-Free Systems
journal, September 2013

  • Han, Zhiji; Shen, Luxi; Brennessel, William W.
  • Journal of the American Chemical Society, Vol. 135, Issue 39
  • DOI: 10.1021/ja405257s

Works referencing / citing this record:

Stable Metal-Organic Frameworks: Design, Synthesis, and Applications
journal, February 2018


Evolutionary structure prediction of two-dimensional IrB 14 : a promising gas sensor material
journal, January 2018

  • Yu, Jun; Khazaei, Mohammad; Umezawa, Naoto
  • Journal of Materials Chemistry C, Vol. 6, Issue 21
  • DOI: 10.1039/c8tc01354c

Efficient solar light-driven H 2 production: post-synthetic encapsulation of a Cu 2 O co-catalyst in a metal–organic framework (MOF) for boosting the effective charge carrier separation
journal, January 2018

  • Karthik, Peramaiah; Balaraman, Ekambaram; Neppolian, Bernaurdshaw
  • Catalysis Science & Technology, Vol. 8, Issue 13
  • DOI: 10.1039/c8cy00604k

Metal‐Organic Frameworks for Hydrogen Energy Applications: Advances and Challenges
journal, March 2019

  • Bakuru, Vasudeva Rao; DMello, Marilyn Esclance; Kalidindi, Suresh Babu
  • ChemPhysChem, Vol. 20, Issue 10
  • DOI: 10.1002/cphc.201801147

Regulating Charge‐Transfer in Conjugated Microporous Polymers for Photocatalytic Hydrogen Evolution
journal, February 2019

  • Mothika, Venkata Suresh; Sutar, Papri; Verma, Parul
  • Chemistry – A European Journal, Vol. 25, Issue 15
  • DOI: 10.1002/chem.201805478

Single frequency fiber laser based on an ultrathin metal–organic framework
journal, January 2019

  • Sun, Zhihao; Jiang, Xiantao; Wen, Qiao
  • Journal of Materials Chemistry C, Vol. 7, Issue 16
  • DOI: 10.1039/c8tc03780a

NanoMOFs: little crystallites for substantial applications
journal, January 2018

  • Majewski, M. B.; Noh, H.; Islamoglu, T.
  • Journal of Materials Chemistry A, Vol. 6, Issue 17
  • DOI: 10.1039/c8ta02132e

Second-generation hexavalent molybdenum oxo-amidinate precursors for atomic layer deposition
journal, January 2017

  • Jurca, T.; Peters, A. W.; Mouat, A. R.
  • Dalton Transactions, Vol. 46, Issue 4
  • DOI: 10.1039/c6dt03952a

Rational Design of Catalytic Centers in Crystalline Frameworks
journal, June 2018


Photocatalytic Hydrogen Production Coupled with Selective Benzylamine Oxidation over MOF Composites
journal, March 2018


Recent Advances in Photocatalysis over Metal–Organic Frameworks‐Based Materials
journal, December 2019


Photocatalytic Hydrogen Production Coupled with Selective Benzylamine Oxidation over MOF Composites
journal, March 2018

  • Liu, Hang; Xu, Caiyun; Li, Dandan
  • Angewandte Chemie International Edition, Vol. 57, Issue 19
  • DOI: 10.1002/anie.201800320

Size and surface controllable metal–organic frameworks (MOFs) for fluorescence imaging and cancer therapy
journal, January 2018

  • Gao, Xuechuan; Cui, Ruixue; Ji, Guanfeng
  • Nanoscale, Vol. 10, Issue 13
  • DOI: 10.1039/c7nr08892b

Metal-Organic Framework (MOF)-Based Drug/Cargo Delivery and Cancer Therapy
journal, March 2017


A Noble‐Metal‐Free CdS/Ni 3 S 2 @C Nanocomposite for Efficient Visible‐Light‐Driven Photocatalysis
journal, April 2018


β-Mo2C/N, P-co-doped carbon as highly efficient catalyst for hydrogen evolution reaction
journal, December 2018


Stable metal–organic frameworks as a host platform for catalysis and biomimetics
journal, January 2018

  • Qin, Jun-Sheng; Yuan, Shuai; Lollar, Christina
  • Chemical Communications, Vol. 54, Issue 34
  • DOI: 10.1039/c7cc09173g

Facile synthesis of a metal–organic framework nanocarrier for NIR imaging-guided photothermal therapy
journal, January 2018

  • Li, Yawei; Xu, Na; Zhou, Junli
  • Biomaterials Science, Vol. 6, Issue 11
  • DOI: 10.1039/c8bm00830b

Metal–Organic Framework Based Catalysts for Hydrogen Evolution
journal, June 2018

  • Zhu, Bingjun; Zou, Ruqiang; Xu, Qiang
  • Advanced Energy Materials, Vol. 8, Issue 24
  • DOI: 10.1002/aenm.201801193

Benzothiazolium-functionalized NU-1000: a versatile material for carbon dioxide adsorption and cyanide luminescence sensing
journal, January 2020

  • Luconi, Lapo; Mercuri, Giorgio; Islamoglu, Timur
  • Journal of Materials Chemistry C, Vol. 8, Issue 22
  • DOI: 10.1039/d0tc01436b

Molybdenum Sulfide within a Metal–Organic Framework for Photocatalytic Hydrogen Evolution from Water
journal, January 2019

  • Noh, Hyunho; Yang, Ying; Ahn, Sol
  • Journal of The Electrochemical Society, Vol. 166, Issue 5
  • DOI: 10.1149/2.0261905jes

A tumor treatment strategy based on biodegradable BSA@ZIF-8 for simultaneously ablating tumors and inhibiting infection
journal, January 2018

  • Wu, Qiong; Li, Mei; Tan, Longfei
  • Nanoscale Horizons, Vol. 3, Issue 6
  • DOI: 10.1039/c8nh00113h

Metal–Organic Framework Supported Cobalt Catalysts for the Oxidative Dehydrogenation of Propane at Low Temperature
journal, November 2016


Nanoparticle/Metal–Organic Framework Composites for Catalytic Applications: Current Status and Perspective
journal, November 2017